@import url('https://fonts.googleapis.com/css2?family=ZCOOL+XiaoWei&display=swap');
/* Basic reset and box-sizing */
:root {
  --primary-saturate-color: #968f7f;   /* Darker cream */
  --primary-color: #a19b8b;            /* Darker cream */
  --primary-color-transparent: rgba(161, 155, 139, 0.5);    /* Transparent version */
  --primary-saturate-color-transparent: rgba(150, 143, 127, 0.5);  /* Transparent version */
  --secondary-color: #222;
  --background-color: #F7F7F7;
  --danger-color: #EA5C74;
  --danger-color-saturate: #D2042D
}

/* Font loading styles */
body {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

body.fonts-loaded {
  opacity: 1;
}
/* :root {
  --primary-saturate-color: #e6cfa1;
  --primary-color: #f4e9d1;
  --secondary-color: #222;
  --background-color: #30a0f5;
} */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  /* user-select: none; */
}
html {
  scroll-behavior: smooth;
  height: 100%;
  width: 100%;
}

::-webkit-scrollbar {
  display: none;
}

body {
  font-family: Arial, sans-serif;
  background: var(--background-color);
  color: var(--secondary-color);
  /* stroke: var(--secondary-color); */
  fill: var(--secondary-color);
  line-height: 1.5;
  height: 100%;
  width: 100%;
}

body * {
  color: inherit;
  fill: inherit;
  /* stroke: inherit; */
  stroke-width: inherit;
}

svg {
  /* stroke: inherit; */
  fill: inherit;
}


nav {
  background-color: var(--primary-color);
  /* position: fixed; */
  width: 100%;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  /* gap: 1rem; */
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  color: var(--secondary-color);
  fill: var(--secondary-color);
  padding-top: 0;
  /* background-color: #333; */
}

nav a.title {
  font-family: "ZCOOL XiaoWei";
  text-decoration: none;
  color: white;
  font-size: 2rem;
  width: 100dvw;
  text-align: center;
  text-transform: uppercase;
}

nav svg.logo {
  width: 50px;
  height: auto;
}

nav ul {
  list-style: none;
  display: flex;
  color: white;
  /* gap: 1rem; */
}

nav ul.right li {
  padding: 0;
}



nav ul svg {
  width: 40px;
  height: auto;
}

nav ul li {
  padding: 1rem 1rem;
}

nav ul li a {
  text-decoration: none;
  color: inherit;
  /* only animate properties that won't affect layout */
  transition: color 0.3s ease, background-color 0.3s ease, transform 0.25s ease, text-shadow 0.25s ease;
  will-change: transform, text-shadow;
  position: relative;
  display: inline-block;
  /* padding: 0.5rem 1rem;
  border-radius: 4px; */
}

nav ul li a.connection {
  background-color: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  font-weight: bold;
  font-size: larger;
  transition: color 0.3s ease, background-color 0.3s ease;
}

nav ul.right li a::before {
  display: none;
}

nav ul.right li a::after {
  display: none;
}

nav ul.right li a:hover {
  background-color: var(--primary-saturate-color);
}

nav ul.right li a.connection {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-saturate-color);
  transition: background-color 0.3s ease, transform 0.3s ease, fill 0.3s ease, stroke-width 0.3s ease;
  /* stroke-width: 5; */
}

nav ul.right li a.connection:hover {
  background-color: var(--primary-saturate-color);
  /* color: var(--primary-saturate-color); */
  /* fill: var(--primary-saturate-color); */
  /* use a translateY lift instead of scale to avoid nudging neighbors */
  transform: translateY(-3px);
  /* stroke-width: 8; */
}

nav ul.right li a.connected {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  transition: color 0.3s ease, transform 0.3s ease, fill 0.3s ease, stroke-width 0.3s ease;
  stroke-width: 5;
}

nav ul.right li a.connected:hover {
  /* background-color: var(--primary-saturate-color); */
  color: var(--primary-saturate-color);
  fill: var(--primary-saturate-color);
  transform: translateY(-3px);
  stroke-width: 8;
}

nav ul li a.current::after {
  content: "";
  display: block;
  width: 80%;
  height: 1.5px;
  background: white;
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
}

nav ul li a:not(.current):not(.connection)::after {
  content: "";
  display: block;
  width: 80%;
  height: 1.5px;
  background: white;
  position: absolute;
  bottom: 50%;
  opacity: 0;
  transition: opacity 0.3s ease, bottom 0.3s ease;
  left: 50%;
  transform: translateX(-50%);
}

nav ul li a:hover:not(.current):not(.connection)::after {
  opacity: 1;
  bottom: -4px;
}



nav ul li a:hover {
  color: var(--background-color);
  /* lift slightly instead of scaling to avoid moving adjacent items */
  transform: translateY(-3px);
  /* simulate bolder look without changing font-weight */
  text-shadow: 0 1px 0 rgba(0,0,0,0.12), 0 0.5px 0 rgba(0,0,0,0.04);
}

div.mobile-menu {
  display: none;
}

.version-number {
  font-size: 0.8rem;
  color: #888;
  opacity: 0.5;
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
  body {
    height: fit-content;
  }
  /* Mobile Navigation Bar */
  nav {
    position: sticky;
    top: 0;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    height: 10dvh;
  }

  nav a.title {
    font-size: 7dvw;
    font-weight: bold;
    width: fit-content;
  }

  /* Mobile Menu Container */
  div.mobile-menu {
    display: flex;
    align-items: center;
    position: relative;
  }

  /* Burger Button */
  button.burger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1001;
  }

  .burger.invisible {
    opacity: 0;
    user-select: none;
    pointer-events: none;
  }

  button.burger span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--secondary-color);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
  }

  button.burger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
    background-color: var(--background-color);
  }

  button.burger.active span:nth-child(2) {
    opacity: 0;
    transform: scale(0);
  }

  button.burger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
    background-color: var(--background-color);
  }

  /* Main Mobile Menu */
  ul.main-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-saturate-color) 100%);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-100%);
    transition: all 0.4s ease;
    padding: 0;
    list-style: none;
  }

  ul.main-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  ul.main-menu li {
    padding: 0;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.3s ease;
  }

  ul.main-menu.open li {
    opacity: 1;
    transform: translateY(0);
  }

  ul.main-menu.open li:nth-child(1) { transition-delay: 0.1s; }
  ul.main-menu.open li:nth-child(2) { transition-delay: 0.2s; }
  ul.main-menu.open li:nth-child(3) { transition-delay: 0.3s; }
  ul.main-menu.open li:nth-child(4) { transition-delay: 0.4s; }

  ul.main-menu li {
    width: 70%;
    display: flex;
  }

  ul.main-menu li a {
    display: block;
    color: var(--background-color);
    text-decoration: none;
    font-size: 2rem;
    font-weight: 600;
    padding: 1rem 2rem;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    border-radius: 15px;
  }

  ul.main-menu li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    transform: scale(0);
    transition: transform 0.3s ease;
    z-index: -1;
  }

  ul.main-menu li a:hover::before {
    transform: scale(1);
  }

  ul.main-menu li a:hover {
    color: var(--background-color);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    transform: translateY(-3px);
  }

  ul.main-menu li a::after {
    background-color: var(--background-color);
  }

  /* Desktop Menu Hidden */
  ul.desktop-menu {
    display: none;
  }

  /* Right Menu Mobile Styles */
  nav ul.right {
    margin-left: 0;
    position: fixed;
    /* bottom: 2rem; */
    left: 100%;
    transform: translateX(-100%) translateY(-800%);
    padding: 0.5rem 1rem;
    /* backdrop-filter: blur(10px); */
    /* opacity: 0; */
    /* visibility: hidden; */
    transition: all 0.4s ease;
    z-index: 1001;
  }

  ul.main-menu.open ~ ul.right {
    opacity: 1;
    visibility: visible;
    transform: translateX(-100%) translateY(0);
  }

  nav ul.right li {
    padding: 0;
  }

  nav ul.right li svg {
    fill: var(--background-color);
    color: var(--background-color);
  }

  nav ul.right li a {
    color: var(--secondary-color);
    padding: 0.8rem 1.5rem;
    /* border-radius: 20px; */
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
  }

  nav ul.right li a.connection {
    background-color: var(--background-color);
    border: 2px solid lightgray;
  }

  nav ul.right li a.connection:hover {
    background-color: var(--primary-saturate-color);
    transform: scale(1.05);
  }

  nav ul.right li a.connected {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--primary-color);
  }

  nav ul.right li a.connected:hover {
    background-color: var(--primary-color);
    color: var(--background-color);
    transform: scale(1.05);
  }

  /* Mobile Menu Overlay */
  .mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  /* Body scroll lock when menu is open */
  body.menu-open {
    overflow: hidden;
    /* height: 100vh; */
  }

  /* Animations for better UX */
  @keyframes slideInFromTop {
    from {
      opacity: 0;
      transform: translateY(-50px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes slideInFromTopButton {
    from {
      opacity: 0;
      transform: translateY(-50px), translateX(-100%);
    }
    to {
      opacity: 1;
      transform: translateY(0), translateX(-100%);
    }
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }

  ul.main-menu.open ~ button li a {
    animation: slideInFromTop 0.5s ease forwards;
  }

  ul.mobile-menu button span {
    transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
  }

  ul.main-menu.open ~ button span {
    background-color: var(--background-color);
  }

  ul.main-menu.open ~ button:nth-child(1) {
    transform: rotate(45deg);
  }
  ul.main-menu.open ~ button:nth-child(2) {
    opacity: 0;
    visibility: 0;
  }
  ul.main-menu.open ~ button:nth-child(1) {
    transform: rotate(-45deg);
  }

  ul.main-menu.open ~ button.burger {
    color: var(--background-color);
  }
}